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<main role="main" aria-label="Page rake-13.0.6/doc/proto_rake.rdoc">

<h1 id="label-Original+Prototype+Rake">Original Prototype Rake<span><a href="#label-Original+Prototype+Rake">&para;</a> <a href="#top">&uarr;</a></span></h1>

<p>This is the original 100 line prototype rake program.</p>
<hr>

<pre class="ruby"><span class="ruby-comment">#!/usr/bin/env ruby</span>

<span class="ruby-identifier">require</span> <span class="ruby-string">&#39;ftools&#39;</span>

<span class="ruby-keyword">class</span> <span class="ruby-constant">Task</span>
  <span class="ruby-constant">TASKS</span> = <span class="ruby-constant">Hash</span>.<span class="ruby-identifier">new</span>

  <span class="ruby-identifier">attr_reader</span> <span class="ruby-value">:prerequisites</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>(<span class="ruby-identifier">task_name</span>)
    <span class="ruby-ivar">@name</span> = <span class="ruby-identifier">task_name</span>
    <span class="ruby-ivar">@prerequisites</span> = []
    <span class="ruby-ivar">@actions</span> = []
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">enhance</span>(<span class="ruby-identifier">deps</span>=<span class="ruby-keyword">nil</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
    <span class="ruby-ivar">@prerequisites</span> <span class="ruby-operator">|=</span> <span class="ruby-identifier">deps</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">deps</span>
    <span class="ruby-ivar">@actions</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">block</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">block_given?</span>
    <span class="ruby-keyword">self</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">name</span>
    <span class="ruby-ivar">@name</span>.<span class="ruby-identifier">to_s</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">invoke</span>
    <span class="ruby-ivar">@prerequisites</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">n</span><span class="ruby-operator">|</span> <span class="ruby-constant">Task</span>[<span class="ruby-identifier">n</span>].<span class="ruby-identifier">invoke</span> }
    <span class="ruby-identifier">execute</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">needed?</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">execute</span>
    <span class="ruby-keyword">return</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@triggered</span>
    <span class="ruby-ivar">@triggered</span> = <span class="ruby-keyword">true</span>
    <span class="ruby-ivar">@actions</span>.<span class="ruby-identifier">collect</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">act</span><span class="ruby-operator">|</span> <span class="ruby-identifier">result</span> = <span class="ruby-identifier">act</span>.<span class="ruby-identifier">call</span>(<span class="ruby-keyword">self</span>) }.<span class="ruby-identifier">last</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">needed?</span>
    <span class="ruby-keyword">true</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">timestamp</span>
    <span class="ruby-constant">Time</span>.<span class="ruby-identifier">now</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">class</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-keyword">self</span>
    <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">[]</span>(<span class="ruby-identifier">task_name</span>)
      <span class="ruby-constant">TASKS</span>[<span class="ruby-identifier">intern</span>(<span class="ruby-identifier">task_name</span>)] <span class="ruby-keyword">or</span> <span class="ruby-identifier">fail</span> <span class="ruby-node">&quot;Don&#39;t know how to rake #{task_name}&quot;</span>
    <span class="ruby-keyword">end</span>

    <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">define_task</span>(<span class="ruby-identifier">args</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
      <span class="ruby-keyword">case</span> <span class="ruby-identifier">args</span>
      <span class="ruby-keyword">when</span> <span class="ruby-constant">Hash</span>
       <span class="ruby-identifier">fail</span> <span class="ruby-node">&quot;Too Many Target Names: #{args.keys.join(&#39; &#39;)}&quot;</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">args</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">&gt;</span> <span class="ruby-value">1</span>
       <span class="ruby-identifier">fail</span> <span class="ruby-string">&quot;No Task Name Given&quot;</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">args</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">&lt;</span> <span class="ruby-value">1</span>
       <span class="ruby-identifier">task_name</span> = <span class="ruby-identifier">args</span>.<span class="ruby-identifier">keys</span>[<span class="ruby-value">0</span>]
       <span class="ruby-identifier">deps</span> = <span class="ruby-identifier">args</span>[<span class="ruby-identifier">task_name</span>]
      <span class="ruby-keyword">else</span>
       <span class="ruby-identifier">task_name</span> = <span class="ruby-identifier">args</span>
       <span class="ruby-identifier">deps</span> = []
      <span class="ruby-keyword">end</span>
      <span class="ruby-identifier">deps</span> = <span class="ruby-identifier">deps</span>.<span class="ruby-identifier">collect</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">d</span><span class="ruby-operator">|</span> <span class="ruby-identifier">intern</span>(<span class="ruby-identifier">d</span>) }
      <span class="ruby-identifier">get</span>(<span class="ruby-identifier">task_name</span>).<span class="ruby-identifier">enhance</span>(<span class="ruby-identifier">deps</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
    <span class="ruby-keyword">end</span>

    <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">get</span>(<span class="ruby-identifier">task_name</span>)
      <span class="ruby-identifier">name</span> = <span class="ruby-identifier">intern</span>(<span class="ruby-identifier">task_name</span>)
      <span class="ruby-constant">TASKS</span>[<span class="ruby-identifier">name</span>] <span class="ruby-operator">||=</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">name</span>)
    <span class="ruby-keyword">end</span>

    <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">intern</span>(<span class="ruby-identifier">task_name</span>)
      (<span class="ruby-constant">Symbol</span> <span class="ruby-operator">===</span> <span class="ruby-identifier">task_name</span>) <span class="ruby-operator">?</span> <span class="ruby-identifier">task_name</span> <span class="ruby-operator">:</span> <span class="ruby-identifier">task_name</span>.<span class="ruby-identifier">intern</span>
    <span class="ruby-keyword">end</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>

<span class="ruby-keyword">class</span> <span class="ruby-constant">FileTask</span> <span class="ruby-operator">&lt;</span> <span class="ruby-constant">Task</span>
  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">needed?</span>
    <span class="ruby-keyword">return</span> <span class="ruby-keyword">true</span> <span class="ruby-keyword">unless</span> <span class="ruby-constant">File</span>.<span class="ruby-identifier">exist?</span>(<span class="ruby-identifier">name</span>)
    <span class="ruby-identifier">latest_prereq</span> = <span class="ruby-ivar">@prerequisites</span>.<span class="ruby-identifier">collect</span>{<span class="ruby-operator">|</span><span class="ruby-identifier">n</span><span class="ruby-operator">|</span> <span class="ruby-constant">Task</span>[<span class="ruby-identifier">n</span>].<span class="ruby-identifier">timestamp</span>}.<span class="ruby-identifier">max</span>
    <span class="ruby-keyword">return</span> <span class="ruby-keyword">false</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">latest_prereq</span>.<span class="ruby-identifier">nil?</span>
    <span class="ruby-identifier">timestamp</span> <span class="ruby-operator">&lt;</span> <span class="ruby-identifier">latest_prereq</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">timestamp</span>
    <span class="ruby-constant">File</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">name</span>.<span class="ruby-identifier">to_s</span>).<span class="ruby-identifier">mtime</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>

<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">task</span>(<span class="ruby-identifier">args</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
  <span class="ruby-constant">Task</span>.<span class="ruby-identifier">define_task</span>(<span class="ruby-identifier">args</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
<span class="ruby-keyword">end</span>

<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">file</span>(<span class="ruby-identifier">args</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
  <span class="ruby-constant">FileTask</span>.<span class="ruby-identifier">define_task</span>(<span class="ruby-identifier">args</span>, <span class="ruby-operator">&amp;</span><span class="ruby-identifier">block</span>)
<span class="ruby-keyword">end</span>

<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">sys</span>(<span class="ruby-identifier">cmd</span>)
  <span class="ruby-identifier">puts</span> <span class="ruby-identifier">cmd</span>
  <span class="ruby-identifier">system</span>(<span class="ruby-identifier">cmd</span>) <span class="ruby-keyword">or</span> <span class="ruby-identifier">fail</span> <span class="ruby-node">&quot;Command Failed: [#{cmd}]&quot;</span>
<span class="ruby-keyword">end</span>

<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">rake</span>
  <span class="ruby-keyword">begin</span>
    <span class="ruby-identifier">here</span> = <span class="ruby-constant">Dir</span>.<span class="ruby-identifier">pwd</span>
    <span class="ruby-keyword">while</span> <span class="ruby-operator">!</span> <span class="ruby-constant">File</span>.<span class="ruby-identifier">exist?</span>(<span class="ruby-string">&quot;Rakefile&quot;</span>)
      <span class="ruby-constant">Dir</span>.<span class="ruby-identifier">chdir</span>(<span class="ruby-string">&quot;..&quot;</span>)
      <span class="ruby-identifier">fail</span> <span class="ruby-string">&quot;No Rakefile found&quot;</span> <span class="ruby-keyword">if</span> <span class="ruby-constant">Dir</span>.<span class="ruby-identifier">pwd</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">here</span>
      <span class="ruby-identifier">here</span> = <span class="ruby-constant">Dir</span>.<span class="ruby-identifier">pwd</span>
    <span class="ruby-keyword">end</span>
    <span class="ruby-identifier">puts</span> <span class="ruby-node">&quot;(in #{Dir.pwd})&quot;</span>
    <span class="ruby-identifier">load</span> <span class="ruby-string">&quot;./Rakefile&quot;</span>
    <span class="ruby-constant">ARGV</span>.<span class="ruby-identifier">push</span>(<span class="ruby-string">&quot;default&quot;</span>) <span class="ruby-keyword">if</span> <span class="ruby-constant">ARGV</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">==</span> <span class="ruby-value">0</span>
    <span class="ruby-constant">ARGV</span>.<span class="ruby-identifier">each</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">task_name</span><span class="ruby-operator">|</span> <span class="ruby-constant">Task</span>[<span class="ruby-identifier">task_name</span>].<span class="ruby-identifier">invoke</span> }
  <span class="ruby-keyword">rescue</span> <span class="ruby-constant">Exception</span> <span class="ruby-operator">=&gt;</span> <span class="ruby-identifier">ex</span>
    <span class="ruby-identifier">puts</span> <span class="ruby-node">&quot;rake aborted ... #{ex.message}&quot;</span>
    <span class="ruby-identifier">puts</span> <span class="ruby-identifier">ex</span>.<span class="ruby-identifier">backtrace</span>.<span class="ruby-identifier">find</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">str</span><span class="ruby-operator">|</span> <span class="ruby-identifier">str</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp">/Rakefile/</span> } <span class="ruby-operator">||</span> <span class="ruby-string">&quot;&quot;</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span>

<span class="ruby-keyword">if</span> <span class="ruby-keyword">__FILE__</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">$0</span> <span class="ruby-keyword">then</span>
  <span class="ruby-identifier">rake</span>
<span class="ruby-keyword">end</span>
</pre>

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